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authorAndy Lutomirski <luto@MIT.EDU>2011-06-05 13:50:23 -0400
committerIngo Molnar <mingo@elte.hu>2011-06-06 09:43:14 +0200
commit5dfcea629a08b4684a019cd0cb59d0c9129a6c02 (patch)
tree0f8c7ae0db1cc4d7bf75dc7dd5612de7c741145c /include/linux/seccomp.h
parentbb5fe2f78eadf5a52d8dcbf9a57728fd107af97b (diff)
x86-64: Fill unused parts of the vsyscall page with 0xcc
Jumping to 0x00 might do something depending on the following bytes. Jumping to 0xcc is a trap. So fill the unused parts of the vsyscall page with 0xcc to make it useless for exploits to jump there. Signed-off-by: Andy Lutomirski <luto@mit.edu> Cc: Jesper Juhl <jj@chaosbits.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Jan Beulich <JBeulich@novell.com> Cc: richard -rw- weinberger <richard.weinberger@gmail.com> Cc: Mikael Pettersson <mikpe@it.uu.se> Cc: Andi Kleen <andi@firstfloor.org> Cc: Brian Gerst <brgerst@gmail.com> Cc: Louis Rilling <Louis.Rilling@kerlabs.com> Cc: Valdis.Kletnieks@vt.edu Cc: pageexec@freemail.hu Link: http://lkml.kernel.org/r/ed54bfcfbe50a9070d20ec1edbe0d149e22a4568.1307292171.git.luto@mit.edu Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/seccomp.h')
0 files changed, 0 insertions, 0 deletions